We had only one ryukin and was given two 4 in koi fish today as a gift.

I have read that these two types of goldfish can only be kept together in outdoor ponds, but was wondering if anyone has had any success in keeping them together in an aquarium?

Any advice would be appreciated.

Thanks!

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Rjya
Guest

Re: GoldFish and Koi - can they be kept together?

« Reply #1 on: December 21, 2009, 08:44:23 PM »

Koi will reach a length of a foot or more during the first year or two of its life and will continue to grow for the next decade. By the time it reaches it full potential , it will weigh more than your average house cat. So if you can imagine two house cats swimming in a 29 gallon aquarium with the ryukin, the picture is not very pretty. You would need an aquarium several hundred gallons in size to be able to successfully raise the two koi fish, thus the reason most koi fish are limited to the outside pond environment.

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asorvia
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Re: GoldFish and Koi - can they be kept together?

« Reply #2 on: December 23, 2009, 03:27:58 PM »

they can stay together for a few months, rest assured. the koi will NOT eat the ryukin, trust me. they will however, steal all of its food after a period of 4 months of you are not careful...but, koi and goldfish normally get along quite well and will happily noodle around together in their eternal quest for munchies in the tank.

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Halaa
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Re: GoldFish and Koi - can they be kept together?

« Reply #3 on: December 24, 2009, 03:34:11 PM »

Goldfish and koi can coexist just fine, but you will likely have to upgrade your tank to a bigger size if you want to keep the koi fish indoor . Koi can grow very fast so a 29 gallon aquarium will not be sufficient for very long.